[PROJ] Formats that use WKT

[Martin Desruisseaux]

Oups! Sorry, accidentally clicked on "sent" (button too close to 
"edition" menu).

GGXF : Gridded Geodetic data eXchange Format
https://github.com/opengeospatial/CRS-Gridded-Geodetic-data-eXchange-Format/

This is the replacement of NADCON, NTv2 and other datum shift formats 
which has been developed as an OGC standard.

I think, if I remember right, that NetCDF-CF conventions also has an 
attribute for WKT in netCDF files.

     Martin